Loom



July 24, 1923. 11,462,6(D3

c. F. LAVALLE LOOM Filed Jan. 31, 1922 2 SheetsSheet 1 INVENT 123E GW YE ATTUHNEYE July 24, 1923.

c. F. LAVALLE LOOM Filed Jan. 31,

2 Sheets-Shea; 2

INVENTEJH m mam/MAJ ATTEJENEYE Patented July 24, 1923.

marten STATES P A T i CHARLES F. LAVALLE, 0F NEWMARKET, NEW HAMPSHIRE.

LOOM'.

Application filed January 31, 1922. Serial No. 533,077.

To all whom it may concern: 'Be i known that I, CHARLES F.-LAVALLE, a citizen of the United States, residing at Newmarket, in the county of vRockingham and State of New Hampshire, have invented new and useful Improvements in Looms, of

which the following is a, specification.

improved means for supporting a marquisette comb, in such manner as to permit a quick and convenient removal and replacement of the comb, and to set up an operative connection between the comb and the mechanism which reciprocates it, solely by the operation of lowering the comb upon two rests .which support it in its predetermined position in the loom.

Another object is to provide improved means for stopping the loom in case of excessivetension onthe warp threads, an element of said means being adapted to constantly maintain a suitable tension on the threads, and being responsiveto an excessive tension on the threads to stop the loom.

The invention isembodied in the improvementswhich I will now proceed to describe and claim. I

.Of the accompanying drawings forming a part. of this specification, I

Figure 1 is a fragmentary front elevation, showing parts of a loom, including the ,parts in whichmy invention is embodied.

Figure 2 is a fragmentary top plan view .offone end portion.

c Figure 3-is a fragmentary top plan view ofthe opposite end portion.

Figure 4is a section online 44 of FigureL, v

The: same-reference characters indicate the same parts in all of the figures.

The marquisette comb which extends crosswise o-fa loom forweaving gauze or leno fabrics, is usually composed of a tubular rod. orpipe l2, supported longitudinally and a longitudinal row of teeth or dents 13, fixed to and projecting downwardly from the rod. The comb is located above the warp threads 14, carried by the usual harness (not shown), and is adapted to receive said warp threads when the harness has been movedupwardly to its highest position, and the threads 14 form the top of the shed. In this position the warp threads 14 are above the warp threads 15, forming the bottom of, the

shed, these warp threads being carried by upright needles 16, of theneedle harness 17.

The comb is longitudinally reciprocated with aslow motion, to' impart lateral movements to the warp threads engaged with it, as usual,.in aloom of this type.

My invention, so far as the comb is concerned, is embodied in the improved means quick and convenient restoration of the comb to its operative condition.

The comb rod 12 is provided at its opposite ends with downwardly facing end portions or extensions 18 and 19, each preferably formed as a separate piece, and having a shank which is inserted in the bore of the rod, and secured therein as by a cotter-pin 20. Each extension has an aperture 21. The downwardly facing surface of the comb extension 18, bears loosely on a rest 22, formed as a bracket attached to the'upper arm 23 of a two-armed lever which is pivotally connected by a fulcrum bolt 24, with an ear 25, fixed to one of the loom sides 26. The lower arm 27 of said lever is angular, as shown by Figure 1, and is connected by a link 28 with a notched arm 29, which is slowly oscillated ina vertical plane in the directions indicated by the arrow in Figure 4, by suitable connections (not shown) with the drivingshaft of the loom.

The rest 22 is provided with an upstanding pin 30, which loosely enters the orifice in the comb extension 18, and couplessaid extension to the rest. The oscillations of the arm 29 are imparted to the two-armed lever of said lever is thus oscillated in the directions required to longitudinally reciprocate the comb, the movements of the arm 23 being imparted to the comb through the pin and extension 18, said extension being movably supported and confined against independent horizontal movement by the pin 30.

The extension 19 at the opposite end of the comb bears loosely on a rest 23, formed as a sleeve which is adapted to rock on a horizontal axis formed by a stud 33, supported by a fixed ear or bearing 34 on thearch stand 35'' above the opposite loom side 35 The rest 32- has an upstanding pin 36, which loosely enters the aperture in the comb extension 19, and couples said ear to the sleeve. The extension 19 is therefore movably supported and confined against horizontal displacement by the pin 36. The described construction permits the comb and its extensions to be lifted clear of the pins 30 and 36, and removed from the rests and from the loom, and to be deposited on the rests by moving its ears downwardly on the pins. There is no positive connectionbetween the comb and the means whereby it is supported and reciproeatechhence there are no fastening devices requiring removal prior to theremoval of the comb.

38 represents a cylindrical tension weight a bar, which extends parallel with the comb,

and rests loosely on the warp threads 15 below the comb. Said weight bar, which is preferably a length of metal tubing, has two functions, one of which is to maintain a suitable tension on the threads 15. The other function is to stop the loom in case of an excessive tension on said threads, liable to cause excessively tight weaving.

The ends of the bar 38 are loosely con} fined, and are vertically movable between upright spaced apart guiding flanges 39, on fixed arms 40, having cars 41 at their upper ends, bearing on fixed brackets 42, and fixed to'said brackets by bolts 43. The brackets 42 are fixed by bolts 44 to the arch stands 26 and 3,5.

It will now be seen that the tension weight bar 38 rests loosely in bights of the warp threads 15, and exerts a constant tension thereon. If from any cause the tension of the threads,- 15 becomes excessive, the bar 38 is raised above its normal position by the threads, until its end portions contact with and move apair of angular stop levers 45,

constituting elements of awell-known mechanism for stopping the 100m, Said stop levers are connected by pivot bolts 46, with cars 47 secured to the'upright arms 40, and their lower arms have terminals'45 located the path in which the bar.38 is movable by an excessive tension on the threads 15. When the bar is raised into contact with the lever terminals 45 the'upper arms of said levers are depressed and act upon other elements of the stopping mechanism to stop the loom.

In Figure 4 l show'conventionally some of the elements of a well known stopping mechanism. v I do not, however, show and describe said mechanism in detail, and may use any suitable mechanism which includes terminal elements, such as the levers 45, adapted to be moved by an abnormal upward movement of the tension weight bar 38.

It will be understood that the parts shown by the drawings, not herein referred to and described, are well" known elements, of a marquisette loom, and do not require description to. afford an understanding of my improvements pointed out bythe appended claims.

I claim: V

419cm mp i a ma uise c having downwardly facing end portions, a pair of restsloosely supporting said end porn t c m b n fre y e b e 1 p wardly to separate it from said rests, means being provided for preventing separation of the comb from the rests by movements of the comb other directions, and means for operating one of said rests to reciprocate the comb, e i i 1 i 2., A loom comprising a marquisette comb havingdownwardly facing end portions, a

pair of nests loosely supporting said end.

portions and permitting independent upward movement of the comb, to remove it from the loom, the rests and comb being provided with coupling means preventing independent movement of the comb in other directions, and means for operating one of said rests to reciprocate the comb.

3. A loom comprising a marquisette comb having downwardly facingend extensions, provided with apertures, a pair of rests loosely supporting said extensions, and provided withupwardly projecting loosely entering thesaid apertures, saidpins and apertures permitting independent upward movement of the comb to remove it from the loom, and preventing independent movement of the comb in other directions, and means for operatingone of rests to reciprocate the comb.

4. Aloom comprising a marquisette comb having apertured extensions at its ends, and

rests on which said extensions bear loosely and separably, said rests having upright pins loosely enteringv the apertures of'said extensions, means being provided for oscillating one of said rests and its pin to longisaid extensions, and provided With a pin loosely entering the aperture thereof, and a loosely rocking rest supporting the other extension, and provided with a pin loosely 5 entering the slot thereof.

6. A loom comprising a inarquisette comb, having apertured extensions at its ends, an oscillatory lever provided .With a bracket forming a rest for one of said extensions,

said bracket having a pin loosely entering 10 the aperture in said extension, and a sleeve mounted to turn or rock on a fixed support, and forming a rest for the other extension, said sleeve having a pin loosely entering the aperture in the extension supported thereby.

In testimony whereof I have aflixed my signature.

' CHARLES F. LAVALLE. 

